Field Notice: FN - 72370 - Some NCS-57C3-MOD-SYS Routers Might Not Read Power Supply Details of NC57-1600W-DCFW - Software Upgrade Recommended

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Updated:September 21, 2022
Document ID:FN72370

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Notice

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Revision History

Revision Publish Date Comments
1.0
14-Sep-22
Initial Release

Products Affected

Affected Product ID Comments
NC57-1600W-DCFW
NC57-1600W-DCFW=
Part Alternate
NCS-57C3-MOD-SYS
NCS-57C3-MOD-SYS=

Defect Information

Defect ID Headline
CSCwa97019 NCS-57C3-MODS-SYS: DCPSU IDPROM Failed to Detect in XR

Problem Description

Some Cisco NCS-57C3-MOD-SYS routers might fail to read the DC power supply details of NC57-1600W-DCFW when the router is power-cycled, when the system is reloaded, or when Online Insertion and Removal (OIR) is performed.

The issue is limited to a discrepancy in the console output of the router and has no impact on the network or traffic.

Background

Cisco IOS® XR software requires a specific command sequence to access the power supply details through Identification Programmable Read Only Memory (IDPROM). It is observed that the IDPROM read errors might cause discrepancies when the power supplies are detected.

The system will power on under normal operation and there is no functionality impact to the routers.

Problem Symptom

An impacted system will exhibit two symptoms.

  • These error messages will appear in the logs:

    0/RP0/ADMIN0:MMM DD HH:MM:SS : card_mgr[2941]: %LIBRARY-PSU-3-IDPROM_READ_FAILURE : Power Module 1 failed to read the IDPROM.
    0/RP0/ADMIN0:MMM DD HH:MM:SS : card_mgr[2941]: %LIBRARY-PSU-3-IDPROM_READ_FAILURE : Power Module 1 failed to read the IDPROM.

  • The show platform command will not detect the power supply, as shown in this example: 
    sysadmin-vm:0_RP0#
sysadmin-vm:0_RP0# show platform | inc PM
MMM DD HH:MM:SS

Workaround/Solution

The workaround for the issue is to restart the Cisco IOS XR Card Manager to bring up the power supply.

  1. Enter the process restart card_mgr location 0/RP0 command:

    sysadmin-vm:0_RP0# process restart card_mgr location 0/RP0

    MMM DD HH:MM:SS

    processes 0/RP0 name card_mgr 0 proc-action

    proc-action-status User cisco (192.X.1XY.Z) requested restart for process card_mgr(0) at 0/RP0  'Sending signal 15 to process card_mgr(IID 0) pid=2940'

    sysadmin-vm:0_RP0# 0/RP0/ADMIN0:Feb 16 09:07:58.420 UTC: pm[2721]: %INFRA-Process_Manager-3-PROCESS_RESTART : Process card_mgr (IID: 0) restarted

  2. Enter the show platform | inc PM command in order to check for the power supply. 
    sysadmin-vm:0_RP0# show platform | inc PM

MMM DD HH:MM:SS
0/PM0   NC57-1600W-DCFW    OPERATIONAL   N/A     NSHUT
0/PM1   NC57-1600W-DCFW    OPERATIONAL   N/A     NSHUT

Note: Repeat the procedure if the workaround fails in the first attempt.

In order to fix this issue, install the recommended SMU.

Cisco recommends to install the SMU that corresponds with the Cisco IOS XR software release that runs on your device, as shown in this table:

Cisco IOS XR Release SMU Link SMU Install Type
Cisco IOS XR Release 7.4.1 ncs5500-sysadmin-7.4.1.CSCwa97019.tar Reboot
Cisco IOS XR Release 7.4.2 ncs5500-sysadmin-7.4.2.CSCwa97019.tar Hitless
Cisco IOS XR Release 7.5.1 ncs5500-sysadmin-7.5.1.CSCwa97019.tar Hitless

 

After you install the SMU, Cisco recommends to enter the show platform | inc PM command in order to view accurate power supply details.

Sample output is shown here:

sysadmin-vm:0_RP0# show platform | inc PM

MMM DD HH:MM:SS
0/PM0   NC57-1600W-DCFW    OPERATIONAL   N/A     NSHUT
0/PM1   NC57-1600W-DCFW    OPERATIONAL   N/A     NSHUT

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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